refactor: remove legacy Tauri desktop support

Electron updater now uses Electron release metadata only
Removed legacy Tauri package and migration workflow
Replaced Tauri shim usage with the desktop bridge

packages/ui/src/lib/ime.ts

@@ -5,10 +5,9 @@ import type React from 'react';
  * Uses both `isComposing` and the `keyCode === 229` fallback.
  *
  * Note: `keyCode` is deprecated, but `229` remains a practical fallback for
- * some WebKit-based environments (including Tauri WebView) where composition
+ * some WebKit-based environments where composition
  * events can be ordered unexpectedly.
  */
 export const isIMECompositionEvent = (e: React.KeyboardEvent): boolean => {
   return e.nativeEvent.isComposing || e.nativeEvent.keyCode === 229;
 };
-